Adjustable trimming attachment for sewing-machines.



No. 693,657. Patented Feb. l8, I902. H. A. KLEMM. ADJUSTABLE TRIMMINGATTACHMENT FOR SEWING MACHINES.

(Application fllad Oct. 2, 1901.)

2 sheets-sheet I.

(No Model.)

INVENTOR WITNESSES:

ATTORNEY Tu: mums PETERS an, vncn'ouwo WASNINGTON. a. c.

No. 693,657. Patented Feb. l8, I902.

. H..A. KLEMM.

ADJUSTABLE TBIMMING ATTACHMENT FOR SEWING MACHINES.

(Application flled oct. 2, 1901.)

2 Sheets-Sheet 2,

(No Model.)

INVENTOB Wm ATTORNEY C i' iW M T llivtrnn stares HERMANN A. KLEMM,

ADJUSTABLE TRIIVHVIING ATTACHMENT FOR SEWING-MACHINES.

PATENT ()FFICE.

OF NElV YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 693,657, dated February18, 1902.

Application filed Octoher 2, 1901, Serial No. 77,290. (No model.)

To aZZ whont it 72mg concern:

Be it known that I, HERMANN A. KLEMM, a citizen of the United States ofAmerica, and a resident of New York city, county and State of New York,have invented certain new alid useful Improvements in Adjustable Trimming Attachments for Sewing-Machines, of which the following is aspecification.

My invention relates to overedge sewingmachines having trimmingattachments adjustable forward and backward relatively to the needle forvarying the widths of the margins outside of the line of stitches andalso having a stitch controlling finger of the presserfoot governing thetension of the loops around the edge of the fabric; and my inventionconsists of the presser-foot carrying such finger mounted adjustably onthe presser-bar and so connected with the adjustable cutter-carryingstock that the presser is automatically adjustable along with thecutters to maintain constant uniform relations-of the controlling-fingerand the adjustable cutters,whereby the proper relation of the presserfor best effects is maintained however the cutters may be shifted, ashereinafter described, reference being made to the accompanyingdrawings, in which- Figure 1 is an end elevation of part of the head ofthe needle-bar, presser-bar, and cutterattachmentsupporting head and theparts carried thereby, with a transverse section of the main shaft. Fig.2 is a side elevation of the same as seen looking in the direction ofthe feedway of the work and with a transverse section of thepresser-foot. Fig. 3 is a horizontal section online 2 2 of Fig. 2. Fig.4 is a horizontal section on line 1 1 of Fig. 2. Fig. 5 is a view inreverse of Fig. 2, with some parts in vertical section on line 5 5 ofFig. 6. Fig. 6 is a View in reverse of Fig. 1, with the main shaft insection on line 6 6 of Fig. 5.

Arepresents the head of the stationary supporting-arm a, carrying thepresser-bar b and the needle 0 in about the same manner as usual.

dis the trimming-cutter-supporting attachment. It is at its upper endattached to the front side of head A by a slideway device 6 and afastening-screw f, so that it may be shifted toward and from the needler laterally to the feed-line for varying the width of the margins of thefabric to be overseamed. The cutter-support (1 extends downward belowthe work-plate (not shown) and carries the stationary cutter gthereunder. The reciprocating cutter h is carried in a vertical slideway2' of the support (Z, (see Fig. 1,) being attached to a reciprocatingblock fitted in a slideway k of said support and connected by pin Z androd on and strap m with an eccentric n on the main shaft 0 for being tociproeated. The lower part of the cuttersupport is formed as a chute pfor discharging the cuttings trimmed off clear of the mechanism; but thecutter attachment is of itself practically the same as shown in myPatent No. 664,277, dated December 18, 1900, to which reference is madefor further understanding of the same and need not be more particularlydescribed herein.

My present invention is as follows: For euabling the presser-foot q toshift in unison with the cutter attachment, so that the finger semployed on said foot for controlling the tension of the thread-loopsformed around the trimmed edges of the fabric may have constant uniformrelation to the cutters and to the trimmed edges, (for best effects,however, the cutters may be shifted,) l mount said foot on ashort shankt instead of mounting it directly on the presser-bar, as usual, andconnect said shank to the presser-bar by a joint consisting of the yokeu, attached to the lower endof the bar, and a pin o, thatis slidable inthe jaws of the yoke and on which the shankt is adjustable between thesaid jaws, where space is provided for shifting the shank to the extentof its desired range of adjustment, and a set-screww is provided forsecuring the shank in its position on the pin. The pin c has at one sideof the yoke u an arm or, capable of turning at one of its ends freelyonthe pin, but incapable of sliding on it, which arm has a slot y in itsother end embracing a stud 2, set in one side of the support (I, thehead of which stud confines the arm 00 between it and said side of thesupport laterally, but allows the necessary oscillatory movement toaccommodate the rising and falling of the presser-foot. Thus at any timeit is desired to shift the cutters the presser-foot shifts accordingly,the pin 1) being shifted forward and backward in the yoke 14 by the arm(1:, which is shifted by the support cl and the stud z. The shank t andthe wall 6 of the space between the yoke members 10 are fitted to bearclosely with each other, and thus any rocking motion of the pressure onthe pin 0) that might otherwise occur is prevented.

It is understood that the slot 3 in the presserfoot q is to havesuitable width to permit the lateral adjustments of the presser-foot, asspecified.

The parts indicated at 4 and 5 represent hook-operatin g devices; butthey form no part of the invention to be claimed and need not be moreparticularly described.

What I claim as my invention is-- 1. In a sewing-machine having an upperand lower trimming-cutter adjustable laterally to' the feed-line, thecombination with HERMANN A. KLEMM.

\Vitnesses:

A. P. THAYER, C. SEDGWICK.

